年份 | 美国 |
---|---|
2023 | - |
2022 | 5.41281 |
2021 | 5.50791 |
2020 | 5.63256 |
2019 | 5.75275 |
2018 | 5.8368 |
2017 | 5.89632 |
2016 | 5.94022 |
2015 | 5.98017 |
2014 | 6.02951 |
2013 | 6.09606 |
2012 | 6.17432 |
2011 | 6.24425 |
2010 | 6.31145 |
2009 | 6.38539 |
2008 | 6.44374 |
2007 | 6.47268 |
2006 | 6.49585 |
2005 | 6.52959 |
2004 | 6.55106 |
2003 | 6.55352 |
2002 | 6.55673 |
2001 | 6.57066 |
2000 | 6.59871 |
1999 | 6.646 |
1998 | 6.71689 |
1997 | 6.81821 |
1996 | 6.95022 |
1995 | 7.08887 |
1994 | 7.19639 |
1993 | 7.24895 |
1992 | 7.24934 |
1991 | 7.21728 |
1990 | 7.17256 |
1989 | 7.11703 |
1988 | 7.06363 |
1987 | 7.03835 |
1986 | 7.03962 |
1985 | 7.05418 |
1984 | 7.06859 |
1983 | 7.06611 |
1982 | 7.02689 |
1981 | 6.94413 |
1980 | 6.85022 |
1979 | 6.77601 |
1978 | 6.72844 |
1977 | 6.73737 |
1976 | 6.86038 |
1975 | 7.09102 |
1974 | 7.34428 |
1973 | 7.57333 |
1972 | 7.77055 |
1971 | 7.92234 |
1970 | 8.06237 |
1969 | 8.28172 |
1968 | 8.619 |
1967 | 9.03041 |
1966 | 9.46248 |
1965 | 9.8592 |
1964 | 10.1765 |
1963 | 10.4266 |
1962 | 10.6424 |
1961 | 10.8133 |
1960 | 10.9201 |